Ellipsograph.



PATENTED OCT. 23, 1906.

' L. PERKINS.

ELLIPSOGRAPH.

APPLICATION FILED MAR.1.1905.

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' No.833,892.- PATBNTED 0GT.23,"190 16 1.. L. PERKINS. 'ELLIPSOGRAPH.

APPLICATION FILED MAR-1| 1905.

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- 'PATENTBD 00123, 1906. J. L. PERKINS. BLLIPSOG'RAPHK APPLIOATION FILED MALI, 1905.

4 SHEETS-SHEET 4.

:1 II I UNITED STATES PATENT OFFICE.

JULIAN L. PERKINS. OF WEST SPRINGFIELD, MASSACHUSETTS.-

ELLIPSOGRAPH 7 Specificat on of Letters Patent.

Patented Oct. 23,1906.

Applieation filed March 1, 1905., Serial No. 247.964.

1'0 va whom it may concern:

Beit known that I, JULIAN L. PERKINS, a

citizen of the United States of America, re-

siding at WestSpringfield, in the county of Hampden and Stateof Massachusetts, have invented .new' and .useful Improvements in Ellipsographs, .ofwhich the following-is a" specification.

This invention relates a to ellipsographs, and isin the nature of an improvement on the machine for .which I filed an application for Letters' Patent of the United States on J anuary 7, 1904, under Serial No. 188,024; and in its general features the presentmachine is identical with the former, the objects of the present invention being to provide improved mechanism whereby the-cutting-tool may be rotated more .orless on its verticalaxis as said tool is carried around in its. prescribed path by the operation of the machine.

A-lfurtherobject of theinvention is to provide an improved bed construction whereby after a plate has been clamped thereon the .in'the'provision of means whereby t-he cutting-tool and certain parts of the actuating mechanism thereof-may be movably support ed relativeto the bed-.platewhereby after the cutting-tool .has been adjusted it .may be elevated away from the, plate; and returned again to operative positionin contact ,With

, the plate, the weight of said vertically-movable-actuating parts serving to.hold the tool in contact .with the block during the operation of the maehine- I Certainother novel features are embodied in this construction, as will clearly appear in thewfollowing specification. and, .be. pointed outin {the claims.

The improved constructionis clearly illus-' trated in the following-drawings, in which {Figure 1 :is a top plan view of the -.machine embodying the invention in its preferred form..:-7L Fig. -2;is a sideelevation of the same.

Fig. 3-;isa longitudinal section taken on line 33, Fig. 1. .Fig. 4 is .a transverse section taken on line 4 4., Fig. 2. Figs. 5, 6, and 7 are plan views of a part of the mechanism for moving the cutting -tool through its prescribed-path and also the mechanism for imparting rotary movement to the cutting-tool on :an axis verticalv to the bed-plate, the

mechanism in these three figures being shown in dlflerent successive pos1t1ons.' Thlsmechanlsm is located on the under SldG-Oft-OIOSS head or bar parallel with thebed-plate. Fig.

8 is a perspective view of the bed-plate removed from the machine, showing certain gages and clamps thereon. Fig. 9 is a perspective view of the tool clamp or holder,

- showing the construction of the depth-gage thereon.

Fig. 10 is a vertical section on line 10.10, Fig. 1, through a portion-of the 1bed-' 1 plate and frame in the planeof oneiof the ad- I justing-screws for the bed. Fig. 11 is a perspectiveview of ,a .portion of the slideway on the frame and a shoe thereln to receive-one of the supporting-legs.

. Referring now. to the drawings, the machine consists in a frame consisting of the ihorizontal frame part a and the end frame parts I), extendingabove the part a, and suitable legs c. 1Pivotally supportedat d near the top of one of the frame members, is a cross :heador bar 6, on which is mounted all of the, actuating mechanism-of the machine.

This head-extends from one endof the .frame b. to the other inparallelism with the horizontal framepart a and may be swungupwardly, i as shownin dotted lines inFig. 2, to give easy access to the bed-platef, which. is adjustably supported on the horizontal frame. part a, 3 means being provided to lock, said head or bar emits elevated position, all as described. in my said prior application. As in my said prior application, thelbar e is provided with a 1 sliding head 9, movable in aslot in said'bar, and on the -;upper surface of thelatter are two transverselyrarrangedribs h, between the edges of which a guide-wheel j rotateson a post is, mounted in sa1d sliding head, said post extending through a slot m, located dia- ,l metrically of said guide-wheel, means being rovided, as the screw. 0 to adjust the sliding ead'g to a positionof more or less eccentricity relative to theaxis of the guide-wheel.

Secured to thellower end of the post his the arm p, at right angles thereto, whichextends transversely of the face of a ring 9, said 5 arm being slotted, as at r,;and a guide-pin s i being inserted in thecring andextending into said slot, whereby the arm pand the ring g lIO ' leg.

may move together. The latter is provided with gear-teeth, with which a pinion t is in mesh, and by means of a crank-arm 7) on the pinion this ring may be rotated, it being supported for that purpose at its periphery in the plates w, secured to the under side of the bar 6. In the arm 2) is a long screw cc, which engages a sliding carriage mounted to slide onthe under side of said arm, and to tl is carriage is secured a rotatable member 3, whose axis (represented by the screw 4) passes through the point of the tool 5, supported in the tool holder or clamp 6, secured fixedly to the rotatable member 3 by a screw 7. This mechanism is thus practically the same as that described in my said prior application with the exception of the tool-carriage and tool-holder.

, On the frame part a of the machine the bed-plate f is supported, as stated, and, as shown in F ig. 1, there are three adjusting screws connected with legs on the under side of this plate, v hneby it maybe shifted in any direction in the plane of the frame part a. The adjusting-screws to move the plate transversely of its length are indicated by 10 and 12 and that to move the plate endwise by 13;

Figs. 10and 11 show the mode of connecting the screws to the bed-plate, the end of the screw, as 1 2, being threaded into the horizontal frame part a of the machine. 011 the frame part a a boss a is cast, in a recess 14 of which a sliding block 15 is located, there being a transversely-located slot in said block in which a short leg 16, cast on the under side of the plate f, extends, the opposite borders of this slot in the block being convex, as at 17, whereby when the plate is being adjusted these legs 16 may have a slight movement on a vertical axis to prevent any binding action between them and the sliding block 15. To take" up any lost motion between the leg 16 and the borders of the slot in the block 15, an adjusting-screw 18 is provided, which may be turned up into contact with one side of the To provide a certain yielding resistance against which the bed-plate f may move when adjusted as described, a bolt (seeFig. 3, indicated by 20) passes through a plate 2]., which bears on the frame part a and on one of the bosses a and is screwed into the bedplate f, and between said plate 21 and the head of the bolt a'spring 22 is located, which holds the plate 21 yieldingly against the bottom of the frame part a, and thus yieldingly holds the bed-plate f against the upper surface of said frame part. The bed-plate is longitudinally slotted through the center thereof, as at 23, through which slot the screws 24 extend into plate-clamps 25 on the bedplate, these clamps being shown in operative engagement with a plate 26 in Fig. 3.

. As shown in Figs. 1 and 2, there is secured to the frame part a of the machine two arms 27, which support a rod 28 inparallelism with the edge of the bed-pl ate at a short distance therefrom and a little above it. Preferably this rod has graduating marks thereon. This rod. is also shown in Fig. 8, and there is supported thereon two fingers 2!), having pointed ends, whereby when these fingers are thrown over to the position shown in Fig. 8 in contact with tl:e plate or negative 26 indentations may be pricked therein wl ich will serve as guide-marks whereby said plate 26 may be accurately relocated on the bed-plate if it becomes necessary to remove the same before all of the operations thereon have been conmleted. Tlese fingers are provided with means to secure them on the rod 28-as, for example, the set-screws 30. Near one end of the rod 28 there is mounted thereon an arm 31, the extremity of which extends over the bed-plate, more or less, and there is pivoted tl'ereto a paperclamp 32, under which one end of a piece of paper 33 may be secured-by means of the fastening device 34. Tliis strip of paper is used for the same purpose as described in my said prior application that is to say, an opening 35, oval-shaped or otherwise, is cut by the machine in the paper having the di mensions representing the boundary of the cut to be made on the plate 26, and the latter is then slipped under the paper, the -lingers 29 being thrown over to the position shown in dotted lines in said Fig. 8 and then adjusted beneath the paper strip to bring such parts of the cut on the plate within said opening 35 as desired, and tlie plate is then secured by the clamps 25, whereupon the paper-clamp may be swung over against the arm 31, or the latter may be loosened on the rod and the arm and the clamp be swung over to vertical position like the dotted position of the fingers 29.

The improved means to rotate the cuttingtool 011 its vertical axis to maintain it in proper tangential position relative to the path it describes are constructed and arranged as follows: On the rotatable memher 3 on the tool-carriage y is a segmental gear 37, and extending from the side of the tool-carriage is a rigid support 38 for another segmental gear 39, rotatably mounted thereon and provided with a rectangularly-extending arm 40, in the end of which is a slot 4], through which a screw 42 extends into a sleeve 43, slidable on a rod 44, one end of which is pivotally supported on the end of a crank-arm 45, which in turn has a pivotal support on the ring q, this construction being clearly shown in Figs. 5, 6, and 7 in plan and Fig. 2 in side elevation. The free end of the rod 44 is pivotally united to a link 46, which by its opposite end is connected to a lever 47, pivotally supported between its end on the ring (1 in substantial parallelism with. the rod 44 when the parts of the machine are in cer tain positionsas, for example, those shown in Figs. and 7 To 'theopposite end of the lever 47 to that with which the link 46 is con-' nected a longer link 48, in substantial parallelism to, the link 46, extends inwardly toward and across the ring, and its inner end is pivotally connected to a rod 50, which extends alongside and parallel with the arm p,

'and that end thereof opposite to the link 48 is pivotally secured at 51 to the ring (1, While near the inner end of the arm 19 is a bearing 52 for the rod 50, whereby the latter is made to follow the movements of the arm p on its axis. Hence during the operation of the machine the arm 19, which, as usual in this class of machines, has acertain swinging movement on its axis as it rotates with the ring q, causes the rod to swing on its pivoted end 51, and thereby through the medium of the link 48, the lever 47, the link 46 to impart a swinging movement to the rod 44 toward and from Means to adjust the degree of rotatory movement imparted to the tool on its vertical axis are provided by the slot 41 in the arm 40,

whereby by moving the pivotal connection between the sleeve 43 and the arm 40 in said 1 slot the throw of the arm 40 may be varied and the rotatory movement of the tool adj usted to a nicety.

Referring now to Figs. 3 and 4, it will be seen that a certain amount of vertical play is provided for and indicated by the space 53, between the sliding head 9 and the arm 19, and the latter (and consequently the cuttingtool) may be raised to take the-tool out of contact with the plate on which it is operated. When the armis so raised,'the post It slides endwise in the head 9, and the guide-wheel j is also raised, (this elevated positionof the parts being shown in Fig. 4,) and the move ment is effected by the axially-rotatable rod 54, the inner end of which is turned up, as shown, at right angles to the lengthwise dirnension thereof, so that the rotation of the rod will serve to cam-the post upward, the

end of saidrod having a bearing on a flange 55 on the post, as shown in saidFig. 4.

Referring now to Fig. 9 particularly, it is seen that the tool-holder consists of a block 56, in which the cutting-tool 5 may be supported adjustably in any suitable way, as by a screw 56 in the proper cutting position. In this tool-holder means are provided to secure it to the rotatable member 3 on the tool-carriage,

' the means shown in this case being the screwthreaded post 57 and nut 58, said post 57 passing through a depending portion of said member 3, as shown in Fig.3. In Fig. 9 is shown also an adjustable depth-gage 59, which consists of a screw-threaded pin vertically disposed relative to the bed-plate in the tool-holder and outside of the latterthat is to say, so disposed that it will bear on the plate outside of the line out by the tool- The upper end of this pin is connected with a rectangularly disposed rotatable rod 60 by means. of the spiral gears 61. The depth-gage may thus be adjusted when the tool-holder is in position on the machine. By providing for the vertical play of the post 7c through theisliding head 9 it is seen that the weight of the parts carried on said post provides the requisite and a definite pressure for holding the tool in contact with the work, and when the desired depth of out has been made in the plate the depth-gage comes to. a bearing on the surface of the plate and determines the depth of the cut.

Having thus described my invention, what I claim, and desire'to secure by Letters Patent of the United States, is-

. 1. In an elli sograph, a suitable frame, a work-holding lifed, a sliding head mountedin the frame to move reciprocally in a fixed plane, a tool-carryin arm rotatably supported by said head, an a tool on the arm, the

latter being movable toward and from the work-holding bed whereby its weight may be supported by the tool when said tool is in contact with the work. v

2. In an ellipsograph, a suitable frame, a

work-holding bed, a sliding head mounted in the frame to move reciprocally in a fixed plane, a tool-carrying arm rotatably supported by said head, and a tool on the arm, the latter being movable toward and from the work-holding bed wherebyit's weight may be supported by the tool when said tool is in contact with the work, and a depthage to receive the weight of the arm when t 6 tool has made a cut of the desired depth.

i 3. In an elli sograph, a suitable frame, a work-holding ed, a sliding head mounted in the frame to move reciprocally in a fixed plane, a tool-carrying arm rotatably supported by said head, and a tool on the arm; means to adjust said work-holding bed and said arm one relative to the other, whereby the weight of the latter may be supported by the tool when said tool is in contact with the work on the bed.

4. In an ellipsograph, a suitable frame, a

work-holding bed supported on the frame,

and means to adjust said bed in the plane of its support; a sliding head mounted in the frame to move reciprocally in a fixed plane parallel with that ofisaid bed, a tool-carryin arm rotatably supported by said head, a too on the arm, and means to adjust said bed'and said arm one relative to the other, whereby the weight of the latter may be supported by the tool when said tool is in contact With the work. I

5. In an ellipsograph, a suitable frame, a sliding head mounted in the frame to move reciprocally in a fixed plane, a ring rotatably supported at its peri hery, said head being adjustable radially 0 said ring, a toolcarry ing arm rotatably supported in said head and having a sliding engagement with said ring, a tool on said arm rotatably supported on the latter on an axis vertical to the plane of rotation of the arm, and means to rotate said tool consisting of a segmental gear thereon, a second segmental gear supported on the arm and in engagement with the first, a rod or bar pivotally connected with the ring at one end and having a bearing near its other end on said arm, whereby the swinging movement of the latter in the plane of said ring may impart like movements to said bar or rod; an arm on said second segmental gear and suitably-disposed lever connections between said arm and said bar or rod whereby the swinging movements of the latter may rotate said segmental gears to rotate the tool. 6. In an ellipsograph, a suitable frame, a work-holding bed supported on the frame,

and means to adjust said bed in the plane of its su port consisting of a plurality of rectangu arly disposed screws, whereby endwise or transverse adjustments of the bed may be effected inde endently or together, and means to apply frictional resistance to the movement of the brake-holding bed.

7. In an ellipsograph, a suitable frame, a work-holding bed supported on the frame, and a rod supported on the frame near one side of the bed and above it, gage-fingers on said rod movable toward and from the workbed to serve as guides whereby a piece of work may be replaced on the bed in the position it occupied before removal.

8. In an ellipsograph, a suitable frame, a work-holding bed supported on, the frame, and a graduated rod supported on the frame near one side of the bed, a paper-clamping device secured to the rod and arranged to swing toward and from the bed whereby a piece of paper having a guide-opening therein may be removed from the work-bed and applied thereto again in the same position,

JULIAN L. PERKINS.

Witnesses:

WM. H. CHAPIN, K. I. CLEMoNs. 

